Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
Mk 02836090 2013-12-03
IMPROVED STARTING BLOCK FOR SWIMMING POOLS
The present invention regards an improved starting
block for swimming pools, which can be used, in
particular but not exclusively during swimming
competition training and racing sessions.
The current sports regulations which define the
rules for swimming competitions (FINA regulations)
provide for that the platform or starting blocks be
made according to specifically outlined ergonomic and
dimensional characteristics. The blocks should for
example be built so as to allow each athlete, in the
forward starts (freestyle, butterfly, breaststroke), to
grip the front part and the sides of the start
platform. On the other hand, the backstroke starting
requires that there be provided proper handgrips on the
front part of the blocks.
In particular, in the start of the backstroke
swimming competitions the current sports regulations
provide for that each swimmer be partly immersed in
water, with the feet resting on the head vertical wall
of the swimming pool and the hands gripping the
handgrips that the starting blocks are provided with.
Usually the swimmer, using the force of the hands,
lifts himself in compression and then launches himself,
with the back facing downwards, in the swimming
direction due to the thrust exerted by the feet on the
wall of the swimming pool.
One of the problems that occur during the start of
the backstroke swimming competitions lies in the fact
that the efficiency of the start action depends both on
the positioning of the feet of the swimmer with respect
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to the wall of the swimming pool and especially on the
friction between the soles of the feet and such wall.
During the starting stage the swimmer launches himself
upwards and the thrust action is thus not orthogonal to
the wall of the swimming pool, but inclined, with a
component of the motion parallel to the wall which
induces the sliding.
Up to date, a possibility for avoiding the
aforementioned drawback is that of making the head
vertical wall of the swimming pool non-slippery.
However, there are objective limits to the effect that
can be obtained, for example for the sake of
pleasantness of the wall to touch and for the sake of
facilitating the operations of cleaning the wall
itself.
In addition, a normal head vertical wall of a
swimming pool does not allow the swimmer to maintain a
position of the feet perfectly orthogonal with respect
to the rest of the body during backstroke upward thrust
starting stage. This prevents the swimmer from
developing the maximum effort possible in the upwards
thrust direction.
Another possibility for avoiding the
aforementioned drawback could be that of inclining at
least part of the head wall of the swimming pool. In
such case, in the upwards thrust stage, the position of
the feet of the swimmer with respect to the rest of the
body could be that of 90 , ideal for obtaining the
maximum effect from the exerted muscle effort. However,
it should be observed that the head wall of a swimming
pool for swimming competitions, excluding the starting
stages of such competitions, should always remain
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vertical and free from obstacles so as to allow the
subsequent turning of the swimmers.
Document US-A-4 134 583 describes a device for
supporting the feet of the swimmer capable of at least
partly overcoming the aforementioned drawbacks. The
support device US-A-4 134 583, connected
to the
starting block by means of belts, is however poorly
stable and scarcely adjustable so as to suit the
various needs of the swimmers.
Thus, an object of the present invention is that
of providing an improved starting block for swimming
pools, particularly but not exclusively useable during
swimming training and race sessions, that is capable of
overcoming the aforementioned drawbacks of the prior
art in an extremely simple, inexpensive and
particularly functional manner.
In detail, an object of the present invention is
to provide an improved starting block for swimming
pools which is capable of providing an ideal support
for the feet of each swimmer during the backstroke
swimming competition starts, regardless of the type of
head wall of the swimming pool on which such starting
block is installed.
Another object of the present invention is to
provide an improved starting block for swimming pools
which allows adjusting the start position to suit the
needs of each swimmer.
A further object of the present invention is to
provide an improved starting block for swimming pools
capable of allowing performing, in an easy and safe
manner, the start of swimming races of any recognized
style, as well as using the swimming pool for training
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and recreational purposes in an entirely safe manner.
These objects according to the present invention are
attained by providing an improved starting block for swimming
pools, that can be particularly but not exclusively used for
swimming training and race sessions.
In accordance with one aspect, there is provided a starting
block for swimming pools comprising: a base portion,
constrainable to a perimetrical structure of a swimming pool at
one head vertical wall of the swimming pool; an upper walkable
portion, supported by said base portion and aligned with the
head vertical wall of the swimming pool so as to be used as a
platform by a swimmer; one or more handgrips, protruding from
said base portion towards an internal part of the swimming pool
and useable by the swimmer during the starting stages of a
swimming competition, and a support means for supporting feet of
the swimmer, said support means being operatively connected to
said starting block and provided with a moving system which
allows said support means to move between an operating position,
wherein said support means leans against the head vertical wall
so as to form a step which is inclined with respect to the head
vertical wall and facing upwards, and a rest position, wherein
said support means is outside the swimming pool and does not
represent an obstacle for swimmers who are inside the swimming
pool or on said starting block wherein said support means is
made up of a plate constrained to said starting block by means
of belts, and wherein said belts are in turn constrained to said
starting block through a bar rotatably connected to a support
framework removably constrained to said starting block so that,
after a swimmer starts, said supporting means can be manually
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removed from said starting block.
The characteristics and advantages of an improved starting
block for swimming pools according to the present invention
shall be more apparent from the following exemplified and non-
limiting description with reference to the attached schematic
drawings wherein:
Figure 1 is a perspective view of a first preferred
embodiment of the improved starting block for swimming pools
according to the present invention, shown in a first operating
configuration;
Figure 2 is a perspective view of the starting block of
figure 1, shown in an intermediate configuration;
Figure 3 is a perspective view of the starting block of
figure 1, shown in a second operating configuration;
Figure 4 is a detailed view of the means for adjusting the
starting block of figure 1;
Figure 5 is a perspective view of a second preferred
embodiment of the improved starting block for swimming pools
according to the present invention, shown in a first operating
configuration;
Figure 6 is a perspective view of the starting block of
figure 5, shown in a second operating
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configuration;
Figure 7 is a perspective view of the means for
adjusting the starting block of figure 5; and
Figure 8 is another perspective view of the means
for adjusting the starting block of figure 5.
With reference to the figures, there is shown an
improved starting block for swimming pools according to
the present invention, indicated in its entirety with
reference number 10. The starting block 10 comprises,
in a per se known manner, a base portion 12,
constrainable to the perimetrical structure of the
swimming pool at one of its head vertical wall, and an
upper walkable portion 14, supported by the base
portion 12 and aligned with the head vertical wall of
the swimming pool so as to be used as a platform by a
swimmer. The starting block 10 also comprises one or
more handgrips 16, protruding from the base portion 12
towards the internal part of the swimming pool and
useable by the swimmer during the start stages of a
swimming competition.
According to the invention, to the starting block
10 there is operatively connected a means 18 for
supporting the feet of the swimmer, provided with a
moving system which allows such support means 18 to
move between a first operating position, wherein such
support means 18 leans against the head vertical wall
so as to form a step which is inclined with respect to
such head vertical wall and facing upwards, and a
second rest position, wherein such support means 18 is
outside the swimming pool and does not represent an
obstacle for the swimmers who are inside such swimming
pool or on the starting block 10.
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In other words the support means 18, when it is
immersed in the swimming pool and leans against the
head vertical wall, forms an inclined step which
confers an ideal support for the feet of the swimmer
during the thrust or upwards thrust stage of the
backstroke start. The inclination of the support means
18 with respect to the head vertical wall of the
swimming pool may for example be regulated so as to
always form an ideal angle for the maximum efficiency
of the thrust action of the swimmer. Similarly, also
the depth of the support means 18 with respect to the
edge of the swimming pool may be adjustable according
to the specific needs of each swimmer.
Immediately after the start of the swimmer the
support means 18 may be moved to a rest position in
which it does not represent an obstacle, or it may be
even removed from the starting block 10. Thus, it is
possible to leave the head vertical wall of the
swimming pool free during the subsequent turning stage
of the swimming competition.
According to the current sports regulations the
support means 18, in its operating position, is
configured so as to be at least partly immersed in the
water of the swimming pool, given that the swimmers
start with the feet under water in the official
backstroke races. However, it cannot be excluded that
the support means 18, in its operating position, may be
on the water surface or even above the water surface,
for example following possible modifications of the
sports regulations or allowing performing other
activities different from the backstroke swimming
competitions starts.
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According to the first embodiment of the starting
block 10, shown in figures 1 to 4, the support means 18
is made up of a plate 20 hinged to the base portion 12
through a rigid frame which allows rotating such
support means 18 to put it away, in its rest position,
on the rear of the starting block 10 (see figures 2 and
3). The rigid frame may be conveniently made up of two
curved bars 22, one for each side of the starting block
10, which in the operating position of the support
means 18 are arranged substantially adjacent to the
edge and to the head vertical wall of the swimming
pool, so as to have the least possible bulk.
As shown in figure 4, the plate 20 may be provided
with means for adjusting its position with respect to
the rigid frame, so as to be able to determine the
position of the support means 18 with respect to the
head vertical wall of the swimming pool. For example,
the adjustment means may be made up of hooks 42,
integral with the plate 20, which can be selectively
engaged in a plurality of slots 44 arranged in
predefined positions along each curved bar 22.
The support means 18 may in any case be provided
with any moving system which allows the passage thereof
from the operating position to the rest position and
vice versa, such as for example an articulated
parallelogram. The movement of the support means 18
when passing from the operating position to the rest
position may be performed manually and, in such case,
it could be facilitated by springs and/or gas dampers
part of the relative moving system. The moving of the
support means 18 when passing from the operating
position to the rest position may even be made
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automated, and in such case, the moving system may be
mechanical, electromechanical, pneumatic or of any
other type and it may be provided with a control and
management electronic system (not shown).
In the case where the moving system is automated,
the control of the action of moving the support means
18 from the operating position to the rest position
could be imparted manually by a designated person, such
as for example a lane judge, using the control and
management electronic system. Alternatively, such
control and management electronic system could be
connected to the start signal of the swimming
competition for activating, with suitable delay, the
control of the movement action of the support means 18
from the operating position to the rest position.
During training, the control of the movement action of
the support means 18 from the operating position to the
rest position could be activated by the swimmer with a
predetermined delay, capable of allowing him to prepare
and start before such support means 18 moves towards
its rest position.
The automated version of the support means 18
shall obviously comply with the current regulations
(directive 2006/42/EC or "machinery directive") of the
field in force, as well as comprise instruments for
preventing the risks of impact with the people present
in the area surrounding the starting block 10. The
support means 18 may for example be provided with a
torque limiting device, rounded portions, soft buffers,
etc., while the relative control and management
electronic system shall always guarantee a suitable
movement speed when passing from the operating position
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to the rest position and vice versa.
According to the second embodiment of the starting
block 10, shown in figures 5 and 6, the support means
18 is made up of a plate 20 constrained to the starting
block 10 by means of belts 24. The belts 24 may be
adjustable length-wise and may be removably constrained
in turn to the starting block 10, for example through a
bar 26. The bar 26 may be rotatably connected to a
support framework 30 removably constrained to the
starting block 10. The rotation of the bar 26 around
the axis thereof with respect to the support framework
30 and, hence, with respect to the starting block 10,
allows obtaining the length-wise adjustment of the
belts 24, which in turn determines the position of the
support means 18 with respect to the head vertical wall
of the swimming pool.
The bar 26 and the relative support framework 30
may be held by a thrust step 28 with which the upper
walkable portion 14 of the starting block 10 may be
provided. The bar 26 and the relative support framework
may obviously also be held by any other suitable
structural element of the starting block 10, such as
for example one or more guides 32 obtained on the upper
walkable portion 14 and/or on the thrust step 28 of the
25 starting block 10. This allows applying the support
means 18 also to pre-existent starting blocks without
leading to any construction modifications. Once the
swimmer starts the backstroke, a similar support means
18 may be manually and easily removed from the starting
30 block 10 and placed on the edge swimming pool.
The length-wise adjustment of the belts 24 may be
obtained through a step-by-step adjustment mechanism 34
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with a plurality of positions (figures 7 and 8),
installed on the bar 26 and on the relative support
framework 30. In detail, the step-by-step adjustment
mechanism 32 comprises a reel 36, integral with each
end of the bar 26, on which there is wound each single
belt 24. At each reel 36 there is provided a toothed
ring nut 38, operatively connected to the bar 26
through a spring so that such toothed ring nut 38 may
exclusively perform an axial movement, limited to some
tenths of millimetres, with respect to the bar 26.
The toothed ring nut 38, when pushed by the
relative spring, is configured so as to be engaged with
a shaped block portion 40 of the support framework 30
for blocking the rotation movement of the bar 26 with
respect to the support framework 30, thus avoiding the
winding/unwinding of each single belt 24 with respect
to the relative reel 36. Vice versa, when the toothed
ring nut 38 is moved manually along the axial direction
of the bar 26, overcoming the force of the relative
spring, there occurs the disengagement of the toothed
ring nut 38 from the corresponding shaped block portion
40 of the support framework 30. Thus, this
configuration allows performing the operation of
winding/unwinding each single belt 24 with respect to
the relative reel 36, thus allowing an easy
adjustability, even by the swimmer, of the height at
which the support means 18 is arranged.
Thus, it cannot be excluded that the support means
18 can be obtained according to other embodiments
different from those illustrated in the attached
figures, thus there cannot be excluded the possibility
of modifying the components constituting the support
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means 18. Thus, for example, in the rest position the
plate 20 could represent a surface on which a
sponsorship sticker can be applied, not only due to the
fact that it is exposed to the view of the public
watching the swimming competition, but also due to the
extra attention that the movement of the support means
18 generates always. The plate 20 could also support a
device for detecting possible movements of the swimmer
before the start signal, so as to identify a false
start.
It has thus been observed that the improved
starting block for swimming pools according to the
present invention attains the previously described
objects. Such improved starting block may be installed
on any type of swimming pool, prefabricated or not,
without altering the method of construction of such
swimming pool, or it may be installed on previously
built swimming pools.
The improved starting block for swimming pools of
the present invention thus conceived can however be
subjected to numerous modifications and variants, all
falling within the same inventive concept; furthermore,
all details can be replaced by technically equivalent
elements. In practice the materials used, as well as
the shapes and dimensions, may vary according to the
technical requirements.
The scope of protection of the invention is thus
defined by the attached claims.
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